Marui had been fully out for the count in his room, dead to even Kirihara's snoring. Akaya, the veteran that he was, got them both up and out in true prompt military fashion, and contrary to what you might expect Marui didn't put up any fight. Sure, being woken up in the middle of the night sucked, but so did (checks notes) dying, so the only extra thing Marui grabbed was his gopro, which he clipped on to the neck of his shirt and immediately turned on before running for the stairs like a good little evacuee.

And hey, look. Iguana in the stairwell. "Zaizen! Wait for me!!"